/Engine/Plugins/Runtime/ReplicationGraph/Source/Public/ReplicationGraphTypes.h
Templatd struct for mapping UClasses to some data type. The main things this provides is that if a UClass* was not explicitly added, it will climb the class heirachy and find the best match (and then store this for faster lookup next time)
template<typename ValueType> struct TClassMap
TFunction< bool...
InitNewElement